#include <iostream>

using namespace std;
enum
{
    UsageError=1,
    ArgError,
    PipeError
};
void Usage(const string& proc)
{
    cout<<"Usage: "<<proc<<"subprocess -num"<<endl;
}

int main(int argc,char* argv[])
{
    if(argc!=2)
    {
        Usage(argv[0]);
        return UsageError;
    }
    
    return 0;
}
